Fountain-pen casing and cap therefor



Dec. 2, 1924. I

y VV. P.l3E VVVTT `F'OUXTIIIWPEN CASING AND CP THEREFOR Filed dan. 21.

, in an outer shell, the

` by the metal construction. The

Patented Der. Z, i924,

l,5l7,4ll

MASSACHUSETTS.

Cl-IUSETTS, TO DE WITT- "IsSSLESETTS, A. CORPORATION v OF FOUNTAIN-PEN CSING ANI) ci? Appncanen fue@ January enlaza.

To all whom t may concern:

Be it known that l, lNiLLnlM l?. DE lNrr'r, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in `Fountain-Yen Cfasings and Caps Therefor, of which the following is a specification.

This invention relates particularly to the casing and cap of a fountain pen.

The object of the invention is to provide a fountain pen in which the casing and the cap are made entirely of metal.

The object of the invention is further to provide a fountain pen with a metal casing and cap in which the outside diameter of the casing and of the Capare substantially the same. f

'lhe advantages secured by this construe tion are that for a given interior diameter, the outer diameter of the cap and casing is much smaller than where the casing and cap are constructed of rubber on account of the thinness of the wall-rendered possible pen is also much lighter than the ordinary metal mounted. pen which is usually made by covering a rubber pen with metal. In the device of this invention the metal cap is made with an inwardly projecting Jflange constituting a seat adapted to engage thepen section and also with a thread for engagement with a similar thread provided on thev casing, the same thread on the casing which engages the thread on the inner shell being adapted to engage a thread on the pen section and thus fasten the section rigidly to the casing. V

It is the object of this invention further to malte a portion of the cap in the form of a cup which renders the device cheap and air tight.

The invention contemplates making` the cap in two parts, comprising an inner shell and an outer shell, the inner shell having formed therein a screw-threaded portion adapted to engage a like screw-threaded portion on the front end of the casing, and said shell also has embodied therein an annular inwardly projecting flange constituting a seat adapted to bear against the front end of the pen section when the lparts 'are assembled. The inner shell is enclosed withfront end of which eX- "casing 5 is tapered as at 7 Serial l. 530,741,

tends beyond the open end of the inner shell.

las hereinafter described and illustrated, the inner shell, forming the cap, may be a cup and the outer shell a tube, or in the inner shell may be a tube open at its opposite ends and the outer shell a cup, as may be desired.

By the construction hereinbefore set forth, it is evident that the inner shell, which is entirely surrounded by the outer shell and which has the mechanical working portions embodied therein, namely, the screw thread,

and the liange or seat, may be made of a n cheap metal while the outer shell may be made of, an expensive metal such as gold or silver and the result attained be more practicable than as iffthe whole cap were made of gold or silver,` for the reason that the inner shell may be made of some metal which is harder and has greater wearing capabilities than the outer shell, the inner shell being made for use and the outer shell being made for ornament. Moreover, the construction of the cap allowsy a much greater pen space when the cap is screwed in position, melting it less liable to draw the init, or cause what is known as sweating.

Furthermore, the pen cap and casing of this invention requires less labor and is for that reason cheaper to produce than the pen casing and cap in which a rubber shell is covered with a metal shell.

*he invention consists in the improved fountain pen casing and cap therefor set forth in the following specilica-tion and particularly pointed out in the claims thereof.

Referring to the drawings Figure l is a longitudinal sectional elevation of my improved fountain pen casing and cap. n

2 is a longitudinal sectional elevation of a modified form of cap.

Like numerals refer to like. parts throughout the several views of the drawings.

In the drawings, referring to Figure 1, 5 is a casing for a fountain pen embodying my invention and 6 is the cap therefor. ,The from the line to the front end of the pen and is also ireferably tapered as at 8 from the line B to the rear end of the pen. The front end of the casing is formed to produce an interiorly screw-threaded portion 9 and an exteriorly screw-threaded portion 10. The interiorly screw-threaded portion 9 engages a pen section 11 which is likewise screw threaded and the exterior-ly screw-threaded portion 10 engages a screw-threaded portion 12 formed on the. front enel` of the inner shell 13 of the cap The inner shell 13, in Figure 1, constitutes a cup and is surrounded by the outer shell 14 which is tubular and the open end of which extends beyond the open end of the inner shell 13 and engages the conical portion '.7 of the casing 5. Vlhe .rear end of the outer shell 11i is closed by providing a 15 thereon which en frcs a disc 16. rllhe outer shell is entirely formed of precious instal, while the inner shell inay be formed of a cheaper and harder and more durable instal. The inner shell 13 is provided with an inwardly extending annular Harige 17 with an inclined face which constitutes a seat and when the parts are assembled as shown in Figure 1 this seat bears against the outer edge of the front end of the pen section 11 forming a line contact therewith, thus entirely closing and providing an air tight chamber 18 in the cap to receive the pen 19. i

The particularl class of fountain pen `shown in the drawings is of that character in which an ink sack 2 0 is provided which is operated to feed the inlr thereinto by any suitable ineans such as a lever 21. It Willy be seen that the outer diameter of the cap 6 is practically the saine as the outer diameter of the casing 5.

In Fig. 2 a inodilied forni of cap is illustrated in which the outer shell 1s" is a cup, while the inner shell 13 is a 'tube open at its opposite ends. The inner shell i3 is of the saine construction as the inneil shell illustrated in Figure 1 Vin that it has embodied therein a seat 17 and a screw thread 12.

The manner of using the device hereinbefore described is the saine as in other fountain pens, that is, the cap is screwed on to the forward end of the -Casing when the pen is not in use and unscrewed therefrom and placed upon the rear end of the casing when. in use.

I claim:

1. A inetal cap for a fountain pen having, in combination, an inner inetal tubular shell having aninterior screw thread thereon at its front end for a portion of its length only and an outer' tubular instal shell enclosing said inner shell and having a straight bore projecting for a substantial distance beyond the open end thereof.

2. A metal cap fora fountain pen having, iin combination, inetal tubular shell 'having an interior screw thread thereon at its front end for a portion of its length only and an outer tubular she-ll enclosing said inner shell and having a straight bore projecting for a substantial distance beyond the open end thereof, one of said shells constituting a cup.

A fountain pen having, in combination, a nietal tubular casing, the front en d of said casing being frusto-conical, said frustoconical portion being interior-ly and eXteriorly screw-threaded adjacent its front end, a pen section in said casing having engageinent with the interior screw thread of said frusto-'conical portion and a metal cap coniprisingy an inner instal tubular shell having an interior screw thread thereon adapted to engage the exterior screw thread on said frusto-conical portion of the casing and an outer tubular inetal shell enclosing said inner shell having a straight bore projecting for a substantial distance beyond the screwthreaded portion thereof and adapted to engage the frusto-conical portion of said casing' when said cap and casing are assembled, the outside diameter ofsaid cap and casing being substantially equal.

s. in article of the. class described coinprising in combination a fountain pen, a cap ineniber ac lapted to enclose the pen sec` tion thereof, a instal shell internally threaded at its lowerinost extremity Xedly inounted within said cap` member, and an integral shoulder' forined iIi-orly of said shelland co-operating with the pen section for enclosing the nib when the cap ineinber covers the pen section.

v5. An article of the class described coniprising in combination a fountain pen, the barrel thereof being` exteriorly threaded at its uppermost extremity, a cap member adaptfedv to enclose the pen section, a inetal shell internally threaded at its lowerinost extremity liXedl-y inonnted within said cap ineinber, and an integral. shoulder forrned interiorly of said shell niernber and adapted to. covoperate with a shoulder on the pen section to enclose the nib when the cap ineniber covers the pen section and the .corresponding threads on .the shell and barrel are screwed together.

6. A cap for a fountain pen having, in combination, an inner metal tubular shell having an interior screw thread thereon at its front end for `a portion of its length only and an outer tubular shell enclosing said inner shell and having a lstraight bore projecting for a substantial .distance beyond the open end thereof.

ln testimony whereof I have hereunto set iny hand in presence .of `two subscribing witnesses.

VILLIAM l?. DE ITT.

Titnesses FRANKMN E- LOW, HAznr. F. LA 

